WO2016103291A1

WO2016103291A1 - Seismic isolation support device

Info

Publication number: WO2016103291A1
Application number: PCT/JP2014/006375
Authority: WO
Inventors: 下田　郁夫; 鈴木　清春
Original assignee: オイレス工業株式会社
Priority date: 2014-12-22
Filing date: 2014-12-22
Publication date: 2016-06-30
Also published as: KR20170100504A; JPWO2016103291A1; US20170342734A1; EP3239557A4; EP3239557A1; CN107110280A

Abstract

A seismic isolation support device 1 is provided with: a support body 8 which, in order to receive the load, acting in the vertical direction V, of a piece of furniture 3 to be supported on a floor 2, is adapted to be affixed to the outer casing 4 of the piece of furniture 3, and which has a circular arc cross-sectioned protruding outer surface 7. The seismic isolation support device 1 is further provided with a rotatable body 12 which is adapted so that: the rotatable body 12 is in contact, at the circular arc cross-sectioned outer surface 9 thereof, with the circular arc cross-sectioned protruding outer surface 7 of the support body 8 so as to be rotatable and slidable thereon in the R-direction about a center O1; the rotatable body 12 is in contact, at the circular arc cross-sectioned protruding outer surface 11 thereof, with the flat surface 10 of the floor 2 so that the rotatable body 12 is rotatable about a center O2; and the rotatable body 12 receives, together with the support body 8, the load of the piece of furniture 3, which acts in the vertical direction V through the support body 8.

Description

Seismic isolation support device

The present invention relates to an eccentric rolling pendulum type seismic isolation support device.

In order to provide seismic isolation support for fixtures such as display stands, bookcases, etc., a seismic isolation support device using a sliding plate or a sliding surface or a rolling seismic isolation support device using a rolling member is used.

JP 7-310459 A

By the way, the sliding seismic isolation support device and the rolling seismic isolation support device have no restoring force, and after the vibration, it is necessary to manually return the furniture and the bookshelf to the original position.

In order to eliminate such a complicated and forceful return operation, for example, the pendulum type seismic isolation device described in Patent Document 1 has been proposed. Is formed with a gentler curvature than the curved surface of the lower surface of the rotating body, and the period of the seismic isolation device is determined by the radius of curvature of the curved surface of the lower surface.

However, since the pendulum type seismic isolation device described in Patent Document 1 requires a support base having a concave portion, a fixture such as a display stand, a building floor on which a book shelf, etc. are installed is directly attached to the seismic isolation device. In order to increase the period of such a pendulum type seismic isolation device in order to cope with long-period earthquakes, a large support base is required, so that installation targets are limited.

The present invention has been made in view of the above-mentioned points, the purpose of which can be installed as it is, such as fixtures such as display stands, building floors on which seismic isolation support objects such as bookshelves are installed, An object of the present invention is to provide a seismic isolation support device that can easily increase the period.

The seismic isolation support device according to the present invention is fixed to one of the ground or base and the base isolation support object so as to receive the load of the base isolation support object to be supported on the ground or base. And a support body having a cross-section arc outer surface, a cross-section arc outer face having a shape complementary to the cross-section arc outer face of the support body, and a cross-section arc outer face having a shape complementary to the cross-section arc outer face of the support body. While being slidably in contact with the outer surface of the arc of the cross section of the support, it is configured to come into contact with the outer surface of the arc of the cross section so that it can freely roll to the flat surface on the other of the ground or base and the base isolation support object. A rotating body that receives the load of the seismic isolation support object together with the body, and the outer surface of the rotating body has a larger radius of curvature than the outer surface of the rotating body. In the state, the section of the rotating body The center of curvature of Kototsu outer surface is positioned eccentrically to one side of one of the ground or base and seismic isolation support object in the vertical direction relative to the center of curvature of arcuate cross-sectional outer surface of the rotating body.

According to the seismic isolation support device of the present invention, the rotating body comes into contact with the convex outer surface of the cross-section arc so that it can freely roll to the flat surface of the other of the ground or the base and the base isolation support object. In a stationary state, the center of curvature of the convex outer surface of the circular arc of the rotating body is eccentric to one side of the ground or the base and the base isolation support object in the vertical direction with respect to the center of curvature of the outer circular arc surface of the rotating body. As a result, it can be installed using the display floor and other fixtures, the building floor where the bookshelf etc. are installed as it is, and the vibration cycle is the center of curvature of the convex outer surface of the circular arc of the rotating body in a stationary state. And the center of curvature of the outer surface of the circular arc of the rotating body can be determined by the amount of eccentricity in the vertical direction.

In the present invention, the cross-sectional arc outer surface of the support body may be a cross-section arc convex surface, and the cross-section arc outer surface of the rotating body may be a cross-section arc concave surface. It is a concave surface, and the cross-sectional arc outer surface of the rotating body may be a cross-section arc convex surface.

In the present invention, the rotating body only needs to be rotatable about the center of curvature of the outer surface of the cross-section arc of the support. In this case, the seismic isolation support device is stationary (the seismic isolation support object to be supported is the ground or the base. The center of curvature of the cross-section arc outer surface of the support and the curvature of the cross-section convex outer surface of the rotating body in a state where the seismic isolation support device does not exhibit seismic isolation function) The center is preferably located on the same vertical line.

In the present invention, the entire rotating body may be made of a rigid member. However, the rotating body includes a rigid body having a cross-section arc outer surface and an elastic body fixed to the rigid body and having a cross-section arc convex outer surface. Conversely, an elastic body having a cross-section arc outer surface and a rigid body fixed to the elastic body and having a cross-section arc convex outer surface may be provided. If the elastic body is interposed between the support and the flat surface, the elastic body can absorb the vertical vibration of the ground or the base, and the elastic body in the stationary state of the seismic isolation support device In addition, if the rotating body has an elastic body having a cross-sectional arc convex outer surface, an unintended flat surface on the cross-section arc convex outer surface that comes into contact with the flat surface can be obtained. To prevent slipping of the rotating body. In addition, it is possible to perform rolling, and such an elastic body may be applied to the support so that the elastic deformation of the elastic body of the support can absorb the vibration in the vertical direction of the ground or the base. .

In the present invention, the support body may be fixed to the seismic isolation support object, and in this case, the rotating body is able to freely roll on the ground surface or the flat surface of the base at the convex outer surface of the cross-section arc. As long as the center of curvature of the convex outer surface of the circular arc of the rotating body is located eccentrically upward in the vertical direction with respect to the center of curvature of the outer surface of the circular arc of the rotating body, On the contrary, the support may be fixed to the ground or the base, and in this case, the rotating body can freely roll on the flat surface of the seismic isolation support object at its convex arc outer surface. The center of curvature of the convex outer surface of the circular arc of the rotating body only needs to be located eccentrically downward in the vertical direction with respect to the center of curvature of the outer surface of the circular arc of the rotating body.

Another seismic isolation support device according to the present invention is fixed to one of the ground or base and the base isolation support object so as to receive the load of the base isolation support object to be supported on the ground or base. A support body having a convex outer surface with a first cross-section arc, and a ground or base having a cross-section arc concave outer surface slidably contacting the first cross-section arc convex outer surface of the support body And a rotating body that receives the load of the seismic isolation support object together with the support body, and a flat surface on the other of the seismic isolation support objects so as to freely roll on the convex outer surface of the second cross section. The rotating body is rotatable about the center of curvature of the concave outer surface of the cross section of the rotating body relative to the support, and the second outer surface of the rotating arc of the rotating body is a cross section of the rotating body. It has a radius of curvature larger than the radius of curvature of the concave outer surface of the arc. In the stationary state, the center of curvature of the convex outer surface of the second cross-section arc of the rotating body is perpendicular to the center of curvature of the concave outer surface of the cross-section arc of the rotating body in one of the ground or base and the seismic isolation support object. It is located eccentric to the side.

According to the other seismic isolation support device of the present invention, the rotating body has a circular arc convex outer surface adapted to roll freely in contact with the flat surface of the other of the ground or the base and the seismic isolation support object. And the rotating body is rotatable with respect to the support body around the center of curvature of the outer surface of the circular arc concave section of the rotating body. The curvature center of the convex outer surface of the second cross-section arc of the rotating body is in the vertical direction with respect to the center of curvature of the concave outer surface of the cross-section arc of the rotating body in a stationary state. As a result of being eccentrically located on one side of the base and seismic isolation support object, it can be installed as it is using the building floor where furniture such as display stands, bookcases, etc. are installed, and The vibration period of the rotating body in a stationary state To be determined by the eccentricity of the vertical direction between the center of curvature of the arcuate sectional 凹外 surface between the center of curvature of the surface arc convex outer surface rotating body, may work to readily long period of.

In a preferred example of another seismic isolation support device of the present invention, the first cross-section arc convex outer surface of the support body has the same radius of curvature as that of the cross-section arc concave outer surface of the rotating body, The center of curvature of the first cross-section arc convex outer surface of the support and the cross-section arc concave outer surface of the rotating body may be located at the same position, and in another example, the first cross-section arc convex outer surface of the support Has a radius of curvature smaller than the radius of curvature of the concave outer surface of the circular arc of the rotating body.

In such other seismic isolation devices, the center of curvature of the first cross-section arc convex outer surface of the support and the cross-section arc concave outer surface and the second cross-section arc convex outer surface of the rotating body are on the same vertical line in the stationary state. It is good to be located.

In another seismic isolation support device of the present invention, the rotating body may consist entirely of a rigid member, but a rigid body having a cross-section arc concave outer surface and a second cross section fixed to the rigid body. An elastic body having an arc convex outer surface, and conversely, an elastic body having a cross-section arc concave outer surface, and a second cross-section arc convex outer surface fixed to the elastic body If the elastic body is interposed between the support body and the flat surface in this way, the elastic body can also absorb the vertical vibration of the ground or the base. On the other hand, a trigger action can be obtained by some elastic deformation of the elastic body in a stationary state, and if the rotating body has an elastic body having a convex outer surface with a second cross-section, a flat surface Sliding against an unintended flat surface on the convex outer surface of the second cross-section arc in contact with The rotating body can be reliably rotated and rolled, and the elastic body is applied to at least one of the main body portion and the sliding portion of the supporting body, thereby supporting the supporting body. The elastic deformation of the elastic body may absorb vibrations in the vertical direction of the ground or base.

In another seismic isolation support device of the present invention, the support may be fixed to the seismic isolation support object. In this case, the rotating body has a ground surface or a base with a second cross-section arc convex outer surface. The center of curvature of the convex outer surface of the second cross-sectional arc of the rotator is offset upward in the vertical direction with respect to the center of curvature of the concave outer surface of the cross-section arc of the rotator. The support body may be fixed to the ground or the base instead, as long as the support body is positioned at the center. In this case, the rotating body is a convex outer surface of the second cross-section arc. The center of curvature of the outer surface of the second circular arc of the rotating body is perpendicular to the center of curvature of the outer surface of the concave arc of the rotating body. What is necessary is just to be eccentrically located below.

In the present invention, the seismic isolation support object to be supported includes furniture such as a display stand such as a store, a book shelf such as an office, a library or a general house, office equipment, a factory machine and a machine bed. , Hospital examinations, diagnostic equipment, small warehouses, etc., but the present invention is not limited to these, and the base is a foundation floor built in the ground, a store, an office, a library, etc. Or the floor of structures, such as a general house, a hospital, a warehouse, etc. can be mentioned, but this invention is not limited to these.

The cross-section arc outer surface of the support and the cross-section arc outer surface of the rotating body, or the first cross-section arc convex outer surface of the rotating body and the cross-section arc concave outer surface of the rotating body, which become the sliding surface, are triggered by a trigger function (sliding occurs at vibration acceleration below a certain level. If the vibration acceleration of a certain level or more does not require a function that causes the sliding) and a vibration damping function (a function that dissipates vibration as heat and dissipates vibration energy that causes sliding), On the other hand, it is preferable to have a surface with an extremely small friction coefficient. When a trigger function and a vibration damping function are obtained, it is preferable to have a surface having a moderate friction coefficient. Having a trigger function can avoid unnecessary and sensitive relative vibrations of the base-isolated support object by applying a small vibration acceleration of the ground or base and applying a small vibration acceleration to the base-isolated support object. If it has a vibration damping function, the base-isolated support object that once vibrates relative to the ground or the base can be quickly returned to a stationary state.

On the other hand, the convex outer surface of the circular arc of the rotating body that serves as the rolling surface is moderate in order not to slip easily against the ground or the base or the flat surface of the base-isolated support object in a horizontal earthquake vibration. It preferably has a magnitude coefficient of friction.

In the present invention, the cross-sectional arc outer surface of the support body and the cross-section arc outer surface and cross-section arc convex outer surface of the rotating body or the first cross-section arc convex outer surface of the support body and the cross-section arc concave outer surface and the second cross-section arc convex outer surface of the rotating body are: It may consist of a part of a cylindrical surface or a part of a spherical surface. If it consists of a part of a cylindrical surface, the seismic isolation effect can be given directionality. If it consists of a part of, the seismic isolation effect can be exhibited against vibrations in all directions on the horizontal plane. When giving directionality to the seismic isolation effect, all of the cross-section arc outer surface of the support and the cross-section arc outer surface and the cross-section arc convex outer surface of the rotary body or the first cross-section arc convex outer surface of the support body and the cross-section arc concave outer surface of the rotary body and It is not necessary to configure all of the second convex circular convex outer surface from a part of the cylindrical surface, and any one may be configured from a part of the cylindrical surface.

Any elastic body may be made of natural rubber, synthetic rubber, or a synthetic resin material having elasticity. When the elastic body is made of natural rubber or synthetic rubber, the elastic body is bonded to a rigid body by vulcanization adhesion. Although it may be fixed, it may be fixed to a rigid body using other adhesives.

The seismic isolation support device according to the present invention rotates in the rotation of the rotating body around the center of curvature of the outer surface of the circular arc of the support or in the rotation of the center of curvature of the concave outer surface of the circular arc of the rotating body relative to the support. It may further comprise a detachment prevention mechanism that prevents the rotation of the rotating body from the support body by prohibiting rotation beyond a certain level due to a body collision, and the detachment prevention mechanism is attached to the support body. And an enclosure surrounding the rotating body. In this case, the surrounding body is rotated at a certain rotation of the rotating body around the center of curvature of the outer surface of the cross-section arc of the supporting body or with respect to the supporting body. The rotating body may have an inner surface with which the rotating body comes into contact in a rotation of a certain level or more around the center of curvature of the concave outer surface of the circular arc of the rotating body.

In the seismic isolation support device equipped with the separation prevention mechanism, even if the rotating body is about to rotate greatly due to unintended large vibrations, the rotating body is prohibited from rotating beyond a certain level to prevent the rotating body from being detached from the support body. As a result, it is possible to prevent the seismic isolation support object from falling, and to minimize damage caused by the earthquake.

According to the present invention, there is provided a seismic isolation support device that can be used as it is by installing a floor such as a display stand, a building floor on which a seismic isolation support target such as a book shelf is installed, and can easily increase the period. Can be offered.

FIG. 1 is a side view illustrating an example of a preferred embodiment according to the present invention. FIG. 2 is an operation explanatory diagram of the example shown in FIG. FIG. 3 is a side view of another example of a preferred embodiment according to the present invention. FIG. 4 is a side view of still another example of a preferred embodiment according to the present invention. FIG. 5 is an operation explanatory diagram of the example shown in FIG. FIG. 6 is a side view of another example of a preferred embodiment according to the present invention. FIG. 7 is an operation explanatory diagram of the example shown in FIG. FIG. 8 is a side view illustrating still another example of the preferred embodiment according to the present invention. FIG. 9 is a side view illustrating still another example of the preferred embodiment according to the present invention. FIG. 10 is a side view illustrating still another example of a preferred embodiment according to the present invention. FIG. 11 is an operation explanatory diagram of the example shown in FIG.

Next, the present invention will be described in more detail on the basis of examples of preferred embodiments shown in the drawings. The present invention is not limited to these examples.

In FIG. 1, the seismic isolation support device 1 of this example is a load in the vertical direction V of a fixture 3 such as a store display stand that is a base isolation support object to be supported on the floor 2 of the store which is the ground or base. In order to receive, it has a cross-section arc convex outer surface 7 having a center O1 which is a center of curvature, and is fixed to the lower portion of the outer box 4 of the fixture 3 through a fixture 6 by a screw 5 or the like. The support 8 has a cross-sectional arc concave outer surface 9 which is complementary to the cross-sectional arc convex outer surface 7 of the support 8 and has a center of curvature at the same position as the center O1. A circular arc convex outer surface 11 having a center O2 which is a center of curvature and a flat surface 10 of the floor 2 is slidable in the R direction around the center O1 and rotatably contacted with the convex outer surface 7 of the circular arc. Centering on the center O2 is rotatable in the R direction, that is, the center O2 is And it comprises a rotating body 12 receives a load in the vertical direction V of furniture 3 through the support 8 together are adapted to freely rolling contact with the heart with the support 8.

The support 8 has a cylindrical main body 23 having a screw portion 21 at the upper portion and a constricted portion 22 at the lower portion, and a partial circular sphere portion 24 provided integrally with the constricted portion 22 of the main body 23. The nut portion 25 screwed into the screw portion 21 is fixed to the fixture 6 at the screw portion 21 so that the position thereof can be adjusted in the vertical direction V, and the cross-section arc convex outer surface 7 is a partial circle as a part of a spherical surface. It consists of a partially spherical convex surface 26 of the sphere portion 24.

The rotating body 12 includes a cross-section arc concave outer surface 9 formed of a partial spherical concave surface 31 as a part of a spherical surface, and a cross-section arc convex outer surface 11 formed of a partial spherical convex surface 32 as a part of a spherical surface. On the one hand, a frustoconical outer surface including a frustoconical outer surface or a frustoquad pyramid outer surface connected to the arcuate convex outer surface 11 on the cross section, and on the other hand, an outer surface of the truncated polygonal pyramid, etc. And the center of curvature of the cross-section arc convex outer surface 7 of the support 8 and the center of curvature of the cross-section arc concave outer surface 9 of the rotating body 12 with respect to the cross-section arc convex outer surface 7 of the support 8. The center O2 that is freely rotatable in the R direction around a certain center O1 and that is the center of curvature of the cross-section arc convex outer surface 11 of the rotating body 12 is in a stationary state (state shown in FIG. 1) of the seismic isolation support device 1. In the center O1 which is the center of curvature of the concave outer surface 9 of the circular arc of the rotating body 12 Then, in the vertical direction V, it is located eccentrically with an eccentricity amount δ above the fixture 3 side, the center O1 which is the center of curvature of the cross-section arc convex outer surface 7 of the support 8 and the cross section of the rotating body 12. The center O2 which is the center of curvature of the arc convex outer surface 11 is located on the same vertical line 35 in the stationary state of the seismic isolation support device 1, and the cross-section arc convex outer surface 11 of the rotating body 12 is seismically isolated. When the apparatus 1 is stationary, the cross-section arc convex outer surface 11 has a radius of curvature r2 that is larger than the distance d between the position P where the flat surface 10 of the floor 2 contacts the center O1, and thus the eccentricity. The core amount δ is r2-d.

Each of the above-mentioned seismic isolation support devices 1 arranged in the lower part of the outer box 4 of the fixture 3 has a stationary state shown in FIG. 1 when the horizontal vibration H caused by the earthquake is not applied to the floor 2. In the state, the load of the fixture 3 is shared on the floor 2 to support the fixture 3, and when the horizontal vibration H due to the earthquake is applied to the floor 2, the rotating body 12 of each seismic isolation support device 1. As shown in FIG. 2, on the flat surface 10 of the floor 2, the seismic isolation support device 1 rotates in the R direction around the center O 1 with respect to the partial spherical portion 24. 2 prevents the horizontal H vibrations applied to 2 from being transmitted to the fixture 3 and thus supports the fixture 3 in isolation, while the cross-section of the convex outer surface of the circular arc due to the eccentricity δ between the center O1 and the center O2 11 is raised in the vertical direction V along with the rotation in the R direction due to the difference between the radius of curvature r2 and the distance d. The rotating body 12 thus configured has a return moment M = W · δ · sin θ at each rotational position of the rotating body 12 (where W is a load applied to the rotating body 12 and δ is an eccentricity). The quantity δ = (r2−d), θ is the rotation angle of the rotating body 12), and this returning moment M causes the rotating body 12 that performs a so-called pendulum motion with a period T to move in the horizontal direction due to the earthquake. After the disappearance of the vibration of the floor 2 of H, it is stationary together with the convergence of the pendulum motion due to the dissipation of the vibration energy due to the sliding friction of the circular arc concave outer surface 9 with respect to the convex outer surface 7 of the cross section and the rolling friction of the rotating body 12 with respect to the flat surface 10 of the floor 2. Returning to the rotational position in the state, the fixture 3 is returned to the original position before the earthquake vibration.

The period T of the pendulum motion of the rotator 12 is expressed by the equation (1). When θ is small, θ / sin θ≈1. As a result, the period T is expressed by the equation (2) and is a cross-sectional arc. The smaller the eccentricity δ (= r2-d), which is the difference between the radius of curvature r2 of the convex outer surface 11 and the distance d, the longer it becomes, and conversely, the larger the eccentricity δ (= r2-d). The larger the size, the shorter.

Here, g is a gravitational acceleration.

In the seismic isolation support device 1 described above, the rotating body 12 is configured to come into contact with the flat surface 10 of the floor 2 so as to roll and rotate freely at the cross-section arc convex outer surface 11, and in the stationary state, the cross-section arc convex outer surface 11. The center O2, which is the center of curvature, is eccentric with respect to the center O1, which is the center of curvature of the concave arcuate outer surface 9 in the vertical direction V by the amount of eccentricity δ. As a result, the flat surface 10 of the floor 2 is used as it is. And the period T of the pendulum motion of the rotating body 12 can be determined by the eccentricity δ which is the difference between the distance d and the radius of curvature r2 of the convex outer surface 11 of the cross-section arc. In addition, the cross-section arc convex outer surface 7 is composed of a partial spherical convex surface 26, the cross-section arc convex outer surface 9 is composed of a partial spherical concave surface 31, and the cross-section arc convex outer surface 11 is formed from the partial spherical convex surface 32. That is, each is a spherical surface Therefore, the fixture 3 can be isolated from the vibrations in all directions with respect to the horizontal direction H. In addition, the mounting position of the support 8 on the fixture 6 by the screw portion 21 and the nut 25 is provided. Therefore, the fixture 3 can be seismically isolated at an arbitrary position in the vertical direction V.

Incidentally, in the seismic isolation support device 1 shown in FIG. 1, the rotating body 12 is formed as an integral body from a rigid body, but instead, for example, as shown in FIG. A rigid body 42 having an outer surface 9, a frustoconical outer surface 33 and a partial spherical convex surface 41, and a natural rubber which is fixed to the partial spherical convex surface 41 of the rigid body 42 by vulcanization and has a cross-sectional arc convex outer surface 11. If the rotating body 12 is provided with the elastic body 43 as a covering layer for the rigid body 42 as described above, it is possible to prevent earthquakes in all directions with respect to the horizontal direction H. In addition to being able to support the fixture 3 in a seismic isolation manner, the elastic body 43 can also support the isolation of the fixture 3 against the vibration caused by the earthquake in the vertical direction V applied to the floor 2 due to the elastic deformation of the elastic body 43. It can also protect the goods, and in addition, it can be So that it is possible to obtain a trigger action in flattening of the cross-sectional arc convex outer surface 11 due to the recess of the partial by partial elastic deformation of the portion of the elastic body 43 for receiving a load of direction V.

In the seismic isolation support device 1 shown in FIG. 1 and FIG. 3, there is a possibility that the rotating body 12 may be detached from the supporting body 8 in the earthquake vibration with the large rotation angle θ of the rotating body 12, but as shown in FIG. 4. Furthermore, the seismic isolation support device 1 rotates more than a certain amount due to the collision of the rotating body 12 in the R direction rotation of the rotating body 12 around the center O1 that is the center of curvature of the convex outer surface 7 of the cross section of the support 8. And a detachment prevention mechanism 51 for preventing the rotator 12 from being detached from the support 8. The detachment prevention mechanism 51 is attached to the support 8 and surrounds the rotator 12. The surrounding body 52 is provided.

The surrounding body 52 is sandwiched between the fixture 6 and the nut 25 and fixed to the screw portion 21 of the support body 8, and the rotating body 12 is integrated with the outer peripheral edge of the ceiling portion 55 at the upper end. And a cylindrical portion 56 that surrounds the lower portion of the cylindrical portion 56, projecting outward in the horizontal direction H from the lower end of the cylindrical portion 56, and contacting the flat surface 10 of the floor 2 at the annular lower surface 57. The annular outer flange 58 and the annular outer flange 58 are integrally formed with the cylindrical portion 56 at the upper portion thereof, projecting inward in the horizontal direction H from the cylindrical inner surface 59 of the cylindrical portion 56, and the rotating body 12 can rotate. And an annular inner flange 62 having a cylindrical inner peripheral surface 61 defining an opening 60.

In the seismic isolation support device 1 having such a detachment prevention mechanism 51, as shown in FIG. 5, a large rotation angle of the rotator 12 about the center O <b> 1 that is the center of curvature of the cross-section arc convex outer surface 7 of the support 8. In the rotation of the rotating body 12 in the R direction more than a certain level due to the vibration of the horizontal H earthquake with θ, the rotating body 12 collides with and comes into contact with the lower surface 63 of the ceiling portion 55 that is the inner surface of the enclosure 52. The above rotation is prohibited, and therefore, in the rotation of the rotating body 12 around the center O1 that is the center of curvature of the cross-section arc convex outer surface 7 of the support 8, the rotating body The surrounding body 52 having the lower surface 63 of the ceiling portion 55, which is the inner surface that the 12 contacts, prevents the rotator 12 from being detached from the partial spherical portion 24 of the support 8.

According to the seismic isolation support device 1 provided with the separation preventing mechanism 51, even if the rotating body 12 is largely rotated by an unintended large horizontal H vibration, the rotating body 12 is prohibited from rotating beyond a certain level. As a result of preventing the detachment of the rotating body 12 from 8, the fall of the fixture 3 can be prevented, and damage caused by the earthquake can be minimized.

In the detachment prevention mechanism 51 having the surrounding body 52, the seismic isolation support device 1 includes the annular outer flange portion 58 that is in contact with the flat surface 10 at the annular lower surface 57 in the stationary state of the seismic isolation support device 1. The inside 65 of the enclosure 52 in a stationary state can be sealed with respect to the outside, dust can be prevented from entering the inside 65, and malfunction of the seismic isolation support device 1 due to dust can be avoided. In addition, by providing an elastic plate similar to the elastic body 43 on the annular lower surface 57 by sticking or the like, or by providing a gap about the thickness of the elastic body 43 between the annular lower surface 57 and the flat surface 10, The function of the elastic body 43 of the rotating body 12 shown in FIG.

In the above-described seismic isolation support device 1, the support 8 is fixed to the outer box 4 of the fixture 3, and the rotating body 12 is brought into rolling contact with the flat surface 10 of the floor 2 with its circular arc convex outer surface 11. Instead of this, the support 8 may be fixed to the floor 2 with the screw portion 21, and the cross-section arc convex outer surface 11 of the rotating body 12 may be rotatably contacted with the flat surface 71 which is the lower surface of the outer box 4 of the fixture 3. In other words, the combination of the support body 8 and the rotating body 12 may be reversed upside down, and in such a seismic isolation support device that is upside down, the center of curvature of the cross-section arc convex outer surface 11 of the rotating body 12 is obtained. The center O2 is deviated from the center O1, which is the center of curvature of the cross-section arc concave outer surface 9 of the rotator 12, with a decentering amount δ below the floor 2 in the vertical direction V when the seismic isolation support device is stationary. It is good to be positioned in the center.

In another example of the seismic isolation support device 1a shown in FIG. 6, a fixture 5 is attached to the lower portion of the outer box 4 of the fixture 3 by a screw 5 or the like so as to receive a load in the vertical direction V of the fixture 3 to be supported on the floor 2. 6 and a support body 8a having a cross-section arc convex outer surface 7a having a center O1 which is the center of curvature, and a shape complementary to the cross-section arc convex outer face 7a of the support body 8a. The circular arc concave outer surface 9a having the center of curvature at the same position as the center O1, and the cross-sectional arc concave outer surface 9a is slidable in the R direction around the center O1 on the circular arc convex outer surface 7a and is rotatable. On the other hand, the flat surface 10 of the floor 2 is in contact with the flat arc surface 11a having the center of curvature O2 in a circular arc convex outer surface 11a so as to be rotatable in the R direction around the center O2, that is, freely rolling around the center O2. When it comes to It is provided with a rotating body 12a receives a load in the vertical direction V via the support 8a of furniture 3 with the support 8a in.

The support 8a is a circular arc having a cylindrical main body 23a having a screw portion 21a at the upper part and a partially spherical convex surface 26a formed integrally with the lower part of the main body 23a and part of a spherical surface. The main body 23a has a convex outer surface 7a and includes a sliding portion 27a disposed between the main body 23a and the rotating body 12a. The main body 23a is positioned with respect to the vertical direction V by a nut 25 screwed into the screw portion 21a. The screw portion 21a is adjustably fixed to the fixture 6 and is fixed to the lower portion of the outer casing 4 of the fixture 3 via the fixture 6. The sliding portion 27a is formed of the main body 23a. The disk part 22a formed integrally in the lower part of this part and the partial sphere part 24a which was formed integrally in the disk part 22a and had the partial sphere convex surface 26a were comprised.

The rotating body 12a includes a cross-section arc concave outer surface 9a composed of a partial spherical concave surface 31a as a part of a spherical surface, and a cross-section arc convex outer surface 11a composed of a partial spherical convex surface 32a as a part of a spherical surface. And an annular end face 33 connected to the cross-sectional arc convex outer surface 11a at the inner peripheral edge and connected to the cross-sectional arc convex outer surface 11a at the outer peripheral edge, and a rotating body with respect to the cross-section arc convex outer surface 7a of the support 8a. The circular arc concave outer surface 9a of 12a is slidably rotatable in the R direction around the center O1 which is also the center of curvature of the circular arc concave outer surface 9a. The convex outer surface 11a of the circular arc is larger than the radius of curvature r1 of the concave outer surface 9a of the circular arc of the rotating body 12a. The center O2 which has a large radius of curvature r2 and is the center of curvature of the cross-section arc convex outer surface 11a of the rotator 12a is a cross section of the rotator 12a in the stationary state of the seismic isolation support device 1a (the state shown in FIG. 6) Arc concave It is located eccentrically with an eccentric amount δ (= r2-r1) above the fixture 3 side in the vertical direction V with respect to the center O1, which is the center of curvature of the surface 9a, and is a cross-sectional arc of the support 8a The center O1 which is the center of curvature of the convex outer surface 7a and the cross-section arc concave outer surface 9a of the rotating body 12a and the center O2 which is the center of curvature of the cross-section arc convex outer surface 11a of the rotating body 12a are in the stationary state of the seismic isolation support device 1a. It is located on the same vertical line 35, and thus the cross-section arc convex outer surface 7a of the support 8a has the same radius of curvature r1 as that of the cross-section arc concave outer surface 9a of the rotating body 12a. The center O1, which is the center of curvature of the cross-section arc convex outer surface 7a of the support 8a and the cross-section arc concave outer surface 9a of the rotating body 12a, is located at the same position.

Each of the above-described seismic isolation support devices 1a arranged at the bottom of the outer box 4 of the fixture 3 has a stationary state as shown in FIG. 6 when the horizontal vibration H is not applied to the floor 2 due to the earthquake. In this state, the load of the fixture 3 is shared on the floor 2 to support the fixture 3, and when a horizontal vibration H is applied to the floor 2 due to an earthquake, the rotating body 12a of each seismic isolation support device 1a 7 is centered with respect to the partial circular sphere portion 24a at the cross-section arc convex outer surface 11a on the flat surface 10 of the floor 2 with the sliding of the cross-section arc concave outer surface 9a with respect to the cross-section arc convex outer surface 7a as shown in FIG. Rotating in the R direction around O1, the seismic isolation supporting device 1a prevents the horizontal H vibration applied to the floor 2 from being transmitted to the fixture 3, thus causing the fixture 3 to move. Cross section due to eccentricity δ between center O1 and center O2 while supporting seismic isolation Due to the difference between the radius of curvature r2 of the arc convex outer surface 11a and the radius of curvature r1 of the cross-section arc concave outer surface 9a, the rotating body 12a is adapted to lift the fixture 3 in the vertical direction V along with the rotation in the R direction. Returning moment M = W · δ · sin θ (where W is the load applied to the rotating body 12a, δ is the eccentricity δ = (r2-r1), and θ is the vertical line The rotation body 12a rotates at a rotation angle of the floor 2 in the horizontal direction H due to the earthquake. Convergence of pendulum motion by dissipating vibration energy due to sliding friction of the circular arc concave outer surface 9a with respect to the circular arc convex outer surface 7a and rolling friction at the circular arc convex outer surface 11a of the rotating body 12a with respect to the flat surface 10 of the floor 2 Is returned to the rotational position at rest, the furniture 3 has returned to the original position before the earthquake vibration.

The period T of the pendulum motion of the rotating body 12a is expressed by the equation (1). When θ is small, θ / sin θ≈1, and as a result, the period T is expressed by the equation (2), The smaller the amount of eccentricity δ (= r2-r1), which is the difference between the radius of curvature r2 of the convex outer surface 11a and the radius of curvature r1 of the concave outer surface 9a of the circular arc in section, the smaller the eccentricity δ (= r2-r1). The larger r2-r1), the shorter.

Even in the seismic isolation support device 1a described above, the rotating body 12a has the cross-section arc convex outer surface 11a adapted to roll and rotate in contact with the flat surface 10 of the floor 2, and in the stationary state, the cross-section arc convex outer surface 11a. The center O2, which is the center of curvature, is eccentric with respect to the center O1, which is the center of curvature of the concave arcuate outer surface 9a, by the amount of eccentricity δ above the vertical direction V. As a result, the flat surface 10 of the floor 2 is used as it is. And the period T of the pendulum motion of the rotating body 12a can be determined by the eccentricity δ, which is the difference between the radius of curvature r1 of the cross-section arc concave outer surface 9a and the radius of curvature r2 of the cross-section arc convex outer surface 11a. In addition, it is possible to easily increase the period, and the cross-section arc convex outer surface 7a is formed of the partial circular convex surface 26a, and the cross-section arc concave outer surface 9a is formed of the partial circular concave surface 31a. Is part Since it is formed of the circular convex surface 32a, that is, each is formed of a spherical surface, the fixture 3 can be isolated from the vibrations of the omnidirectional earthquake with respect to the horizontal direction H. Since the attachment position of the support 8a to the fixture 6 can be adjusted by the portion 21a and the nut 25, the fixture 3 can be seismically isolated at an arbitrary position in the vertical direction V.

Incidentally, in the seismic isolation support device 1a shown in FIG. 6, the rotating body 12a is formed as an integral body from a rigid body, but instead, for example, as shown in FIG. A rigid body 42a having a partial spherical concave surface 31a, an annular end surface 33a and a partial circular convex surface 41a formed of the outer surface 9a, and a cross-sectional arc convex fixed to the partial spherical convex surface 41a of the rigid body 42a by vulcanization adhesion The elastic body 43a made of natural rubber having a partially spherical convex surface 32a made of the outer surface 11a may be provided. Thus, the rotating body 12a includes the elastic body 43a as a covering layer for the rigid body 42a. In this case, the fixture 3 can be isolated and supported against earthquake vibrations in all directions with respect to the horizontal direction H, and also due to elastic deformation of the elastic body 43a against vibrations caused by an earthquake in the vertical direction V applied to the floor 2.什3 is seismically isolated and can protect the fixture 3 itself and the articles in the fixture 3, and in addition, the portion of the elastic body 43 a that receives the load in the vertical direction V in a stationary state is partially recessed due to elastic deformation. The triggering action can be obtained by flattening the cross-section arc convex outer surface 11a caused by the above.

In the seismic isolation support device 1a shown in FIGS. 6 and 8, the cross-sectional arc convex outer surface 7a of the support 8a has the center O1 at the same position as the center O1 of the cross-sectional arc concave outer surface 9a of the rotating body 12a, and Although the radius of curvature r1 is the same as the radius of curvature r1 of the circular arc concave outer surface 9a of the rotating body 12a, instead of this, for example, as shown in FIG. From the radius of curvature r1 of the cross-section arc concave outer surface 9a of the rotary body 12a having the center O3 on the same vertical line 35 at a position different from the position of the center O1 of the cross-section arc concave outer surface 9a of the rotary body 12a and the vertical direction V. May have a small radius of curvature r3. In this case, the slidable surface contact between the cross-section arc convex outer surface 7a and the cross-section arc concave outer surface 9a of the seismic isolation support device 1a shown in FIGS. Compared to the cross-section arc convex A slidable substantially point contact between 7a and arcuately sectioned 凹外 surface 9a.

In the seismic isolation support device 1a described above, there is a possibility that the rotating body 12a may be detached from the supporting body 8a in the case of an earthquake with a large rotation angle θ of the rotating body 12a. However, as shown in FIG. The device 1a supports the rotation of the rotating body 12a in the R direction around the center O1, which is the center of curvature of the circular arc concave outer surface 9a with respect to the support 8a, by preventing the rotation of the rotating body 12a from exceeding a certain amount. The above-described detachment preventing mechanism 51 for preventing the rotator 12a from being detached from the body 8a may be further provided. In the detachment preventing mechanism 51, the surrounding body 52 surrounds the rotating body 12a, and the cylindrical portion 56 is provided. Encloses the rotating body 12a from the periphery, and the rotating body 12a can be rotated by the opening 60.

In the seismic isolation support device 1a provided with such a detachment prevention mechanism 51, as shown in FIG. 11, a large rotation angle of the rotating body 12a around the center O1 that is the center of curvature of the cross-section arc convex outer surface 7a of the support 8a. In the rotation of the rotating body 12a in the R direction more than a certain level due to the vibration of the horizontal H earthquake with θ, the rotating body 12a collides with and comes into contact with the lower surface 63 of the ceiling portion 55, and further rotation in the R direction occurs. Thus, the rotating body 12a comes into contact with the rotating body 12a when the rotating body 12a rotates about a center O1 that is the center of curvature of the cross-section arc convex outer surface 7a of the supporting body 8a. The surrounding body 52 having the lower surface 63 of the ceiling portion 55 which is the inner surface prevents the rotator 12a from being detached from the sliding portion 27a of the support 8a in the same manner as described above.

According to the seismic isolation support device 1a provided with the separation preventing mechanism 51, as described above, even if the rotating body 12a is to be rotated greatly by an unintended large horizontal H vibration, the rotating body 12a is rotated more than a certain amount. As a result of prohibition and prevention of detachment of the rotating body 12a from the support body 8a, it is possible to prevent the fixture 3 from falling down and to minimize damage caused by an earthquake.

The separation preventing mechanism 51 with respect to the seismic isolation support device 1a also includes the annular outer flange 58 that contacts the flat surface 10 with the annular lower surface 57 in the stationary state of the seismic isolation support device 1a. The inside 65 of the surrounding body 52 in the stationary state can be sealed from the outside, dust can be prevented from entering the inside 65, and malfunction of the seismic isolation support device 1a due to dust can be avoided. In the seismic isolation support device 1 a of this example, an elastic plate may be provided on the annular lower surface 57, or a gap may be provided between the annular lower surface 57 and the flat surface 10.

In the above seismic isolation support device 1a, the support 8a is fixed to the outer box 4 of the fixture 3, and the cross-section arc convex outer surface 11a of the rotating body 12a is brought into rolling contact with the flat surface 10 of the floor 2, Instead, similarly to the seismic isolation support device 1, the support body 8 a is fixed to the floor 2 with the screw portion 21 a, and the cross-section arc convex outer surface 11 a of the rotating body 12 a is placed on the flat surface 71 that is the lower surface of the outer box 4 of the fixture 3. In other words, the combination of the support body 8a and the rotating body 12a may be turned upside down. In such a seismic isolation support device that is upside down, the cross-section arc of the rotating body 12a The center O2 that is the center of curvature of the convex outer surface 11a is on the floor 2 side in the vertical direction V with respect to the center O1 that is the center of curvature of the concave outer surface 9a of the circular arc of the rotating body 12a in the stationary state of the seismic isolation support device. Located eccentrically with an eccentricity δ below Good.

DESCRIPTION OF

SYMBOLS

1, 1a Seismic isolation support apparatus 2 Floor 3 Fixture 4 Outer box 5 Screw 6

Attachment

7, 7a, 11, 11a Cross-section circular convex

outer surface

8,

8a Support body

9, 9a Cross-section circular concave outer surface 10

Flat surface

12, 12a Rotating body O1, O2 center d distance r1 radius of curvature r2 radius of curvature

Claims

In order to receive the load of the seismic isolation support object to be supported on the ground or base, it is fixed to one of the ground or base and the seismic isolation support object, and has a cross-section arc outer surface. And a cross-sectional arc outer surface of a shape complementary to the outer surface of the cross-section arc of the support and slides on the outer surface of the cross-section arc of the support with the outer shape of the cross-section arc complementary to the outer surface of the cross-section arc of the support. While freely contacting, the load of the seismic isolation support object together with the support is designed to be able to roll on the flat surface in the other of the ground or base and the seismic isolation support object so that it can freely contact with the convex outer surface of the cross-section arc. The outer surface of the circular arc of the rotating body has a radius of curvature larger than the radius of curvature of the outer surface of the circular arc of the rotating body. The center of curvature of the outer surface is rotated While seismic isolation support device is positioned eccentrically to the side of one of the ground or base and seismic isolation support object in the vertical direction relative to the center of curvature of arcuate cross-sectional outer surface of the.
2. The seismic isolation support device according to claim 1, wherein the cross-sectional arc outer surface of the support body is a cross-section arc convex surface, and the cross-section arc outer surface of the rotating body is a cross-section arc concave surface.
2. The seismic isolation support device according to claim 1, wherein the cross-sectional arc outer surface of the support body is a cross-section arc concave surface, and the cross-section arc outer surface of the rotating body is a cross-section arc convex surface.
The seismic isolation support device according to any one of claims 1 to 3, wherein the cross-section arc outer surface of the support body and the cross-section arc outer surface and the cross-section arc convex outer surface of the rotating body are part of a cylindrical surface.
The seismic isolation support device according to any one of claims 1 to 3, wherein the cross-sectional arc outer surface of the support body and the cross-section arc outer surface and the cross-section arc convex outer surface of the rotating body are part of a spherical surface.
The seismic isolation support device according to any one of claims 1 to 5, wherein the rotating body is rotatable with respect to the support centering on a center of curvature of an outer surface of the cross-section arc of the support body.
7. The seismic isolation support device according to claim 6, wherein the center of curvature of the outer surface of the cross-sectional arc of the support and the center of curvature of the outer surface of the convex arc of the cross-section of the rotating body are located on the same vertical line in a stationary state.
The rotator includes a rigid body having a cross-sectional arc outer surface and an elastic body fixed to the rigid body and having a cross-sectional arc convex outer surface. Seismic support device.
The rotating body includes an elastic body having a cross-section arc outer surface, and a rigid body fixed to the elastic body and having a cross-section arc convex outer surface. Seismic isolation support device.
The support body is fixed to the seismic isolation support object, and the rotating body is configured to freely contact the ground surface or the flat surface of the base at the outer surface of the convex arc of the cross section. The center of curvature of the outer surface of the convex arc of the cross section is located eccentrically upward in the vertical direction with respect to the center of curvature of the outer surface of the circular arc of the rotating body. Support device.
The support body is fixed to the ground or the base, and the rotating body is configured to freely contact the flat surface of the seismic isolation support object at the outer surface of the circular arc of the cross section. The center of curvature of the outer surface of the convex arc of the cross section is located eccentrically downward in the vertical direction with respect to the center of curvature of the outer surface of the arc of the cross section of the rotating body. Support device.
Further provided with a separation preventing mechanism for preventing the separation of the rotating body from the support body by prohibiting the rotation of the rotating body more than a certain amount due to the collision of the rotating body in the rotation of the rotating body around the center of curvature of the outer surface of the arc of the cross section of the support body The seismic isolation support device according to any one of claims 1 to 11.
The separation prevention mechanism includes an enclosure that is attached to the support and surrounds the rotating body, and the enclosure is more than a certain amount of the rotating body centered on the center of curvature of the outer surface of the cross-section arc of the support. The seismic isolation support device according to claim 12, which has an inner surface with which the rotating body comes into contact.
In order to receive the load of the seismic isolation support object to be supported on the ground or the base, the first cross-section arc is fixed to one of the ground or the base and the base isolation support target On the other side of the ground or the base and the seismic isolation support object, while having a support having a convex outer surface and a cross-section arc concave outer surface slidably contacting the convex outer surface of the first cross-section arc of the support The flat surface is configured to freely contact with the convex outer surface of the second cross-section arc, and includes a rotating body that receives the load of the seismic isolation support object together with the support body. On the other hand, it is rotatable about the center of curvature of the concave outer surface of the circular arc of the rotating body, and the convex outer surface of the second circular arc of the rotating body is larger than the radius of curvature of the concave outer surface of the circular arc of the rotating body. And in a stationary state, the second of the rotating body The center of curvature of the cross-section arc convex outer surface is eccentrically positioned on one side of the ground or base and the base-isolated support object in the vertical direction with respect to the center of curvature of the cross-section arc concave outer surface of the rotating body. Seismic isolation support device.
The seismic isolation support device according to claim 14, wherein the first cross-section arc convex outer surface of the support body and the cross-section arc concave outer surface of the rotating body are formed of a part of a cylindrical surface.
The seismic isolation support device according to claim 14, wherein the first cross-section arc convex outer surface of the support and the cross-section arc concave outer surface of the rotating body are formed of a part of a spherical surface.
The support body is fixed to one of the ground or the base and the seismic isolation support object, and is formed integrally with the main body section and has the first cross-section arc convex The seismic isolation support device according to any one of claims 14 to 16, comprising an outer surface and a sliding portion disposed between the main body portion and the rotating body.
The seismic isolation support device according to any one of claims 14 to 17, wherein the first cross-section arc convex outer surface of the support has the same radius of curvature as that of the cross-section arc concave outer surface of the rotating body.
19. The seismic isolation support device according to claim 18, wherein the centers of curvature of the first cross-section arc convex outer surface of the support and the cross-section arc concave outer surface of the rotating body are located at the same position.
The seismic isolation support device according to any one of claims 14 to 17, wherein the first cross-section arc convex outer surface of the support body has a radius of curvature smaller than the curvature radius of the cross-section arc concave outer surface of the rotating body.
21. The seismic isolation support device according to claim 14, wherein in a stationary state, the center of curvature of the cross-section arc concave outer surface and the second cross-section arc convex outer surface of the rotating body is located on the same vertical line. .
The stationary center of the first cross-section arc convex outer surface of the support and the center of curvature of the second cross-section arc concave outer surface of the rotating body and the second cross-section arc convex outer surface of the support body are located on the same vertical line. The seismic isolation support device according to any one of the above.
The rotating body includes a rigid body having a concave outer surface with a circular arc in cross section and an elastic body fixed to the rigid body and having a convex outer surface with a second cross sectional arc. The seismic isolation support device described in 1.
The rotating body includes an elastic body having a concave outer surface of a circular arc and a rigid body fixed to the elastic body and having a convex outer surface of a second cross sectional arc. The seismic isolation support device according to item.
The support body is designed to be fixed to the seismic isolation support object, and the rotating body is configured to freely come into contact with the ground surface or the flat surface of the base at the second section arc convex outer surface, 25. The center of curvature of the convex outer surface of the second cross-sectional arc of the rotating body is located eccentrically upward in the vertical direction with respect to the center of curvature of the outer concave surface of the arc of the rotating body. The seismic isolation support device according to item.
The support is adapted to be fixed to the ground or the base, and the rotating body is adapted to freely contact the flat surface of the seismic isolation support object at the second section arc convex outer surface, 26. The center of curvature of the convex outer surface of the second cross-section arc of the rotating body is located eccentrically downward in the vertical direction with respect to the center of curvature of the concave outer surface of the section arc of the rotating body. The seismic isolation support device according to item.
A detachment prevention mechanism that prevents the rotation of the rotating body from the support by prohibiting the rotation of the rotating body beyond a certain level when the rotating body collides with the rotating body around the center of curvature of the concave outer surface of the circular arc with respect to the supporting body. 27. The seismic isolation support device according to any one of claims 14 to 26.
The detachment prevention mechanism includes a surrounding body that is attached to the support body and surrounds the rotating body, and the surrounding body is constant around the center of curvature of the concave outer surface of the circular arc of the rotating body relative to the supporting body. The seismic isolation support device according to claim 27, having an inner surface with which the rotating body contacts in the above rotation.